Methyl tert-butyl ether

Methyl tert-butyl ether (MTBE), also known as tert-butyl methyl ether, is an organic compound with a structural formula (CH3)3COCH3. MTBE is a volatile, flammable, and colorless liquid that is sparingly soluble in water. Primarily used as a fuel additive, MTBE is blended into gasoline to increase its octane rating and knock resistance, and reduce unwanted emissions.

Methyl tert-butyl ether
Names
Preferred IUPAC name
2-Methoxy-2-methylpropane
Other names
  • Methyl tertiary-butyl ether
  • Methyl t-butyl ether
  • MTBE
  • tert-Butyl methyl ether
  • tBME
  • tert-BuOMe
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.015.140
KEGG
UNII
  • InChI=1S/C5H12O/c1-5(2,3)6-4/h1-4H3 Y
    Key: BZLVMXJERCGZMT-UHFFFAOYSA-N Y
  • InChI=1/C5H12O/c1-5(2,3)6-4/h1-4H3
    Key: BZLVMXJERCGZMT-UHFFFAOYAA
  • O(C(C)(C)C)C
Properties
C5H12O
Molar mass 88.150 g·mol−1
Appearance colourless liquid
Density 0.7404 g/cm3
Melting point −109 °C (−164 °F; 164 K)
Boiling point 55.2 °C (131.4 °F; 328.3 K)
26 g/L (20 °C)
Viscosity 0.36 cP at 25 °C
Hazards
NFPA 704 (fire diamond)
1
3
Flash point −33.0 °C (−27.4 °F; 240.2 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
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